Servant of the Muses by Brad A. White

Jake Conrad is a two-bit detective in the City by the Bay. For twenty dollars a day – plus expenses – he’ll take your case. When his assistant Clio vanishes one foggy San Francisco morning, Jake finds himself on his hardest case yet. A mysterious redhead wants Clio found, but some people want to make sure she stays lost forever. Everyone’s got a motive, and everyone’s playing their own game. If Jake can’t figure it out, his hero’s journey may be over before it begins in this noir mythical mystery.